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The meaning of CRAZY is not mentally sound : marked by thought or action that lacks reason : insane —not used technically. How to use crazy in a sentence.

Definition of crazy adjective in Oxford Advanced American Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

8 meanings: informal 1. foolish or irrational 2. wildly excited; out of control 3. fantastic; strange; ridiculous 4..... Click for more definitions.

Crazy definition: Mentally deranged. Origin of Crazy From EtymOnline: 1570s, "diseased, sickly," from craze + -y (2). Meaning "full of cracks or flaws" is from 1580s; that of "of unsound mind, or behaving …

crazy: Mentally deranged. Though there was a song about the Nut-brown Maid too; I think she was crazy, crazy Kate, but I can t justly remember. II. First Impressions. Book VI—The Great Temptation …

like crazy (informal) to a great degree; very intensely we are just working like crazy Examples For some reason, that set them both off once more and they started laughing like crazy.North American It's not …

Definition of Crazy in the Definitions.net dictionary. Meaning of Crazy. What does Crazy mean? Information and translations of Crazy in the most comprehensive dictionary definitions resource on …

CRAZY definition: mentally deranged; demented; insane. See examples of crazy used in a sentence.

Aug 5, 2025 · Discover the comprehensive meaning of "crazy" – its etymology, definitions, and real-world examples. This glossary entry clarifies usage across contexts, from historical origins to modern …